I paid attention to the term, don’t know where it’s taken from. Veil is an aspect of consciousness. Not unconsciousness. So what is dividing consciousness and unconsciousness is situated in consciousness. It’s like a fence between you and neighbour is on your plot.
Trying to understand the word aspect I’ve found such meaning: “a particular feature of or way of thinking about something, esp. something complicated”.
So maybe veil can be interpreted as consciously thinking there is a free will.